Condensed Consolidated Statement of Shareholder's Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Shares outstanding, beginning balance at Apr. 01, 2018		10,631,992
Stockholders' equity, beginning balance at Apr. 01, 2018	$ 202,247	$ 532	$ 53,877	$ 147,242	$ 596
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared	0
Share-based compensation expense	470		470
Vesting of restricted stock (shares)		24,567
Vesting of restricted stock	0	$ 1	(1)
Shares surrendered for payroll taxes (shares)		(8,105)
Shares surrendered for payroll taxes	(265)	$ 0	(265)
ESPP shares issued (shares)		22,531
ESPP shares issued	$ 677	$ 1	676
Shares repurchased (shares)	0	0
Shares repurchased	$ 0
Other comprehensive income, net of tax	27				27
Net income	9,123			9,123
Shares outstanding, ending balance at Jul. 01, 2018		10,670,985
Stockholders' equity, ending balance at Jul. 01, 2018	212,279	$ 534	54,757	156,365	623
Shares outstanding, beginning balance at Mar. 31, 2019		10,592,450
Stockholders' equity, beginning balance at Mar. 31, 2019	217,861	$ 530	52,609	164,405	317
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared	(2,460)			(2,460)
Share-based compensation expense	509		509
Vesting of restricted stock (shares)		27,620
Vesting of restricted stock	0	$ 1	(1)
Shares surrendered for payroll taxes (shares)		(9,160)
Shares surrendered for payroll taxes	$ (343)	$ (1)	(342)
Shares repurchased (shares)	(47,136)	(47,136)
Shares repurchased	$ (1,803)	$ (2)	(1,801)
Other comprehensive income, net of tax	(179)				(179)
Net income	9,807			9,807
Shares outstanding, ending balance at Jun. 30, 2019		10,563,774
Stockholders' equity, ending balance at Jun. 30, 2019	$ 223,392	$ 528	$ 50,974	$ 171,752	$ 138